Michael Bacarella has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/30027
Change subject: Documentation/mainboard/lenovo/t420.md: add pic of chip ......................................................................
Documentation/mainboard/lenovo/t420.md: add pic of chip
Provide pic of the flash IC with pinouts labeled, as well as additional text about the chip.
Signed-off-by: Michael Bacarella michael.bacarella@gmail.com Change-Id: I9046fa63dcd4d192836417efac68ca7587ac1c91 --- M Documentation/mainboard/lenovo/t420.md A Documentation/mainboard/lenovo/t420_chip_location.png 2 files changed, 11 insertions(+), 2 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/27/30027/1
diff --git a/Documentation/mainboard/lenovo/t420.md b/Documentation/mainboard/lenovo/t420.md index ff7a0a9..9516a4c 100644 --- a/Documentation/mainboard/lenovo/t420.md +++ b/Documentation/mainboard/lenovo/t420.md @@ -1,8 +1,17 @@ # Lenovo T420
## Flashing instructions -You have to disassemble the whole device, as the flash IC is on the bottom -of the mainboard. +The flash IC is located at the bottom center of the mainboard. Sadly, +access to the IC is blocked by the magnesum frame, so you need to disassemble +the entire laptop and remove the mainboard. + +Below is a picture of IC on the mainboard, with the pinouts labeled. + +[t420_chip_location]: t420_chip_location.png + +The chip will either be a Macronix MX25L6404E (shown above) or a Winbond +W25Q64CVSIG. Do not rely on dots painted in the corner of the chip (such as +the blue dot pictured) to orient the pins!
For more details have a look at [T420 / T520 / X220 / T420s / W520 common] and
diff --git a/Documentation/mainboard/lenovo/t420_chip_location.png b/Documentation/mainboard/lenovo/t420_chip_location.png new file mode 100644 index 0000000..b9172ac --- /dev/null +++ b/Documentation/mainboard/lenovo/t420_chip_location.png Binary files differ